/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2020. All rights reserved.
 * secGear is licensed under the Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *     http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
 * PURPOSE.
 * See the Mulan PSL v2 for more details.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "enclave_t.h"

#define BUF_MAX 32
#define Mkey  "admin"  //主密钥，用于生成存储密钥
char uname[20];//用户名
char upsw[56];//用户密码
char buff[80];//用户名与密码相连字符串
char uinfo[31];//用户机密信息,字符串
char ucipher[64];//用户十六进制密文字符串
char c[32];//用户十六进制转字符串
unsigned char cipt[40];//sm3加密后生成的存储密钥
int num=0;
char key[16];//sm4加密密钥
char acipt[40];//sm4加密后生成的信息密文
char temp[32];
int nnn;



void transname(char *name)//获得用户名
{
    strncpy(uname,name, strlen(name));
}
void transpsw(char *psw)//获得用户密码
{
    strncpy(upsw,psw, strlen(psw));
}
void transinfo(char *info)//获得用户机密信息
{
    strncpy(uinfo,info, strlen(info));
}
void transcipher(char *cipher)//获得用户机密信息
{
    strncpy(ucipher,cipher, strlen(cipher));
}

//SM3

#include "sm3.h"

void sm3()
{
	strncpy(buff, uname, strlen(uname));//获得用户名
	strncat(buff, upsw, strlen(upsw));//连接用户密码
	strncat(buff, Mkey, strlen(Mkey));//连接用户密码
    SM3_CTX c;
    sm3_init(&c);
    sm3_update(&c, buff, strlen(buff));
    sm3_final(&c, cipt);
}

//SM4加密算法

#include "sm4.h"

/**
 * S盒
 */
static const int S[16][16] = 
{ 
    {
        0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 
        0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76
    },
	{
        0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 
        0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0
    },
	{
        0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 
        0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15
    },
	{
        0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 
        0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75
    },
	{
        0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 
        0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84
    },
	{
        0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 
        0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf
    },
	{
        0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 
        0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8
    },
	{
        0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 
        0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2
    },
	{
        0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 
        0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73
    },
	{
        0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 
        0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb
    },
	{
        0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 
        0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79
    },
	{
        0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 
        0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08
    },
	{
        0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 
        0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a
    },
	{
        0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 
        0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e
    },
	{
        0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 
        0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf
    },
	{
        0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 
        0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
    }
};
/**
 * 逆S盒
 */
static const int S2[16][16] = 
{ 
    {
        0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 
        0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
    },
	{
        0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 
        0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
    },
	{
        0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 
        0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
    },
	{
        0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 
        0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
    },
	{
        0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 
        0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
    },
	{
        0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 
        0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
    },
	{
        0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 
        0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
    },
	{
        0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 
        0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
    },
	{
        0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 
        0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
    },
	{
        0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 
        0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
    },
	{
        0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 
        0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
    },
	{
        0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 
        0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
    },
	{
        0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 
        0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
    },
	{
        0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 
        0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
    },
	{
        0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 
        0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
    },
	{
        0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 
        0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
    } 
};
/**
 * 获取整形数据的低8位的左4个位
 */
static int getLeft4Bit(int num) 
{
	int left = num & 0x000000f0;
	return left >> 4;
}
/**
 * 获取整形数据的低8位的右4个位
 */
static int getRight4Bit(int num) 
{
	return num & 0x0000000f;
}
/**
 * 根据索引，从S盒中获得元素
 */
static int getNumFromSBox(int index) 
{
	int row = getLeft4Bit(index);
	int col = getRight4Bit(index);
	return S[row][col];
}
/**
 * 把一个字符转变成整型
 */
static int getIntFromChar(char c) 
{
	int result = (int) c;
	return result & 0x000000ff;
}
/**
 * 把16个字符转变成4X4的数组，
 * 该矩阵中字节的排列顺序为从上到下，
 * 从左到右依次排列。
 */
static void convertToIntArray(char *str, int pa[4][4]) 
{
	int k = 0;
	for(int i = 0; i < 4; i++)
		for(int j = 0; j < 4; j++) {
			pa[j][i] = getIntFromChar(str[k]);
			k++;
		}
}
/**
 * 把连续的4个字符合并成一个4字节的整型
 */
static int getWordFromStr(char *str) 
{
	int one = getIntFromChar(str[0]);
	one = one << 24;
	int two = getIntFromChar(str[1]);
	two = two << 16;
	int three = getIntFromChar(str[2]);
	three = three << 8;
	int four = getIntFromChar(str[3]);
	return one | two | three | four;
}
/**
 * 把一个4字节的数的第一、二、三、四个字节取出，
 * 入进一个4个元素的整型数组里面。
 */
static void splitIntToArray(int num, int array[4]) 
{
	int one = num >> 24;
	array[0] = one & 0x000000ff;
	int two = num >> 16;
	array[1] = two & 0x000000ff;
	int three = num >> 8;
	array[2] = three & 0x000000ff;
	array[3] = num & 0x000000ff;
}
/**
 * 将数组中的元素循环左移step位
 */
static void leftLoop4int(int array[4], int step) 
{
	int temp[4];
	for(int i = 0; i < 4; i++)
    {
		temp[i] = array[i];
    }
	int index = step % 4 == 0 ? 0 : step % 4;
	for(int i = 0; i < 4; i++)
    {
		array[i] = temp[index];
		index++;
		index = index % 4;
	}
}
/**
 * 把数组中的第一、二、三和四元素分别作为
 * 4字节整型的第一、二、三和四字节，合并成一个4字节整型
 */
static int mergeArrayToInt(int array[4]) 
{
	int one = array[0] << 24;
	int two = array[1] << 16;
	int three = array[2] << 8;
	int four = array[3];
	return one | two | three | four;
}
/**
 * 常量轮值表
 */
static const int Rcon[10] = 
{ 
    0x01000000, 0x02000000,
	0x04000000, 0x08000000,
	0x10000000, 0x20000000,
	0x40000000, 0x80000000,
	0x1b000000, 0x36000000 
};
/**
 * 密钥扩展中的T函数
 */
static int T(int num, int round) 
{
	int numArray[4];
	splitIntToArray(num, numArray);
	leftLoop4int(numArray, 1);//字循环
	//字节代换
	for(int i = 0; i < 4; i++)
    {
		numArray[i] = getNumFromSBox(numArray[i]);
    }
	int result = mergeArrayToInt(numArray);
	return result ^ Rcon[round];
}
//密钥对应的扩展数组
static int w[44];
/**
 * 扩展密钥，结果是把w[44]中的每个元素初始化
 */
static void extendKey(char *key) 
{
	for(int i = 0; i < 4; i++)
    {
		w[i] = getWordFromStr(key + i * 4);
    }
	for(int i = 4, j = 0; i < 44; i++) 
    {
		if( i % 4 == 0) 
        {
			w[i] = w[i - 4] ^ T(w[i - 1], j);
			j++;//下一轮
		}
        else 
        {
			w[i] = w[i - 4] ^ w[i - 1];
		}
	}
}
/**
 * 轮密钥加
 */
static void addRoundKey(int array[4][4], int round) 
{
	int warray[4];
	for(int i = 0; i < 4; i++) 
    {
		splitIntToArray(w[ round * 4 + i], warray);
		for(int j = 0; j < 4; j++) 
        {
			array[j][i] = array[j][i] ^ warray[j];
		}
	}
}
/**
 * 字节代换
 */
static void subBytes(int array[4][4])
{
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			array[i][j] = getNumFromSBox(array[i][j]);
        }
    }
}
/**
 * 行移位
 */
static void shiftRows(int array[4][4]) 
{
	int rowTwo[4], rowThree[4], rowFour[4];
	//复制状态矩阵的第2,3,4行
	for(int i = 0; i < 4; i++) 
    {
		rowTwo[i] = array[1][i];
		rowThree[i] = array[2][i];
		rowFour[i] = array[3][i];
	}
	//循环左移相应的位数
	leftLoop4int(rowTwo, 1);
	leftLoop4int(rowThree, 2);
	leftLoop4int(rowFour, 3);
	//把左移后的行复制回状态矩阵中
	for(int i = 0; i < 4; i++) 
    {
		array[1][i] = rowTwo[i];
		array[2][i] = rowThree[i];
		array[3][i] = rowFour[i];
	}
}
/**
 * 列混合要用到的矩阵
 */
static const int colM[4][4] = 
{ 
    {2, 3, 1, 1},
	{1, 2, 3, 1},
	{1, 1, 2, 3},
	{3, 1, 1, 2} 
};
static int GFMul2(int s) 
{
	int result = s << 1;
	int a7 = result & 0x00000100;
	if(a7 != 0) 
    {
		result = result & 0x000000ff;
		result = result ^ 0x1b;
	}
	return result;
}
static int GFMul3(int s) 
{
	return GFMul2(s) ^ s;
}
static int GFMul4(int s) 
{
	return GFMul2(GFMul2(s));
}
static int GFMul8(int s) 
{
	return GFMul2(GFMul4(s));
}
static int GFMul9(int s) 
{
	return GFMul8(s) ^ s;
}
static int GFMul11(int s) 
{
	return GFMul9(s) ^ GFMul2(s);
}
static int GFMul12(int s) 
{
	return GFMul8(s) ^ GFMul4(s);
}
static int GFMul13(int s) 
{
	return GFMul12(s) ^ s;
}
static int GFMul14(int s) 
{
	return GFMul12(s) ^ GFMul2(s);
}
/**
 * GF上的二元运算
 */
static int GFMul(int n, int s) 
{
	int result;
	if(n == 1)
    {
		result = s;
    }
	else if(n == 2)
    {
		result = GFMul2(s);
    }
	else if(n == 3)
    {
		result = GFMul3(s);
    }
	else if(n == 0x9)
    {
		result = GFMul9(s);
    }
	else if(n == 0xb)//11
    {
		result = GFMul11(s);
    }
	else if(n == 0xd)//13
    {
		result = GFMul13(s);
    }
	else if(n == 0xe)//14
    {
		result = GFMul14(s);
    }
	return result;
}
/**
 * 列混合
 */
static void mixColumns(int array[4][4]) 
{
	int tempArray[4][4];
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			tempArray[i][j] = array[i][j];
        }
    }
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			array[i][j] = GFMul(colM[i][0],tempArray[0][j]) ^ 
                                GFMul(colM[i][1],tempArray[1][j]) 
				                ^ GFMul(colM[i][2],tempArray[2][j]) 
                                ^ GFMul(colM[i][3], tempArray[3][j]);
		}
    }
}
/**
 * 把4X4数组转回字符串
 */
static void convertArrayToStr(int array[4][4], char *str) {
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			*str++ = (char)array[j][i];	
        }
    }
}
/**
 * 参数 p: 明文的字符串数组。
 * 参数 plen: 明文的长度。
 * 参数 key: 密钥的字符串数组。
 */
void sm4(char *p, int plen, char *key)
{
	extendKey(key);//扩展密钥
	int pArray[4][4];
	for(int k = 0; k < plen; k += 16) 
    {	
		convertToIntArray(p + k, pArray);
		addRoundKey(pArray, 0);//一开始的轮密钥加
		for(int i = 1; i < 10; i++)
        {//前9轮
			subBytes(pArray);//字节代换
			shiftRows(pArray);//行移位
			mixColumns(pArray);//列混合
			addRoundKey(pArray, i);
		}
		//第10轮
		subBytes(pArray);//字节代换
		shiftRows(pArray);//行移位
		addRoundKey(pArray, 10);
		convertArrayToStr(pArray, p + k);
	}
}
/**
 * 根据索引从逆S盒中获取值
 */
static int getNumFromS1Box(int index) 
{
	int row = getLeft4Bit(index);
	int col = getRight4Bit(index);
	return S2[row][col];
}
/**
 * 逆字节变换
 */
static void deSubBytes(int array[4][4]) 
{
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			array[i][j] = getNumFromS1Box(array[i][j]);
        }
    }
}
/**
 * 把4个元素的数组循环右移step位
 */
static void rightLoop4int(int array[4], int step) 
{
	int temp[4];
	for(int i = 0; i < 4; i++)
    {
		temp[i] = array[i];
    }
	int index = step % 4 == 0 ? 0 : step % 4;
	index = 3 - index;
	for(int i = 3; i >= 0; i--) 
    {
		array[i] = temp[index];
		index--;
		index = index == -1 ? 3 : index;
	}
}
/**
 * 逆行移位
 */
static void deShiftRows(int array[4][4]) 
{
	int rowTwo[4], rowThree[4], rowFour[4];
	for(int i = 0; i < 4; i++) 
    {
		rowTwo[i] = array[1][i];
		rowThree[i] = array[2][i];
		rowFour[i] = array[3][i];
	}
	rightLoop4int(rowTwo, 1);
	rightLoop4int(rowThree, 2);
	rightLoop4int(rowFour, 3);
	for(int i = 0; i < 4; i++) 
    {
		array[1][i] = rowTwo[i];
		array[2][i] = rowThree[i];
		array[3][i] = rowFour[i];
	}
}
/**
 * 逆列混合用到的矩阵
 */
static const int deColM[4][4] = 
{ 
    {0xe, 0xb, 0xd, 0x9},
	{0x9, 0xe, 0xb, 0xd},
	{0xd, 0x9, 0xe, 0xb},
	{0xb, 0xd, 0x9, 0xe} 
};
/**
 * 逆列混合
 */
static void deMixColumns(int array[4][4]) 
{
	int tempArray[4][4];
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			tempArray[i][j] = array[i][j];
        }
    }
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			array[i][j] = GFMul(deColM[i][0],tempArray[0][j]) ^ 
                                GFMul(deColM[i][1],tempArray[1][j]) ^ 
                                GFMul(deColM[i][2],tempArray[2][j]) ^ 
                                GFMul(deColM[i][3], tempArray[3][j]);
		}
    }
}
/**
 * 把两个4X4数组进行异或
 */
static void addRoundTowArray(int aArray[4][4],int bArray[4][4]) 
{
	for(int i = 0; i < 4; i++)
    {
		for(int j = 0; j < 4; j++)
        {
			aArray[i][j] = aArray[i][j] ^ bArray[i][j];
        }
    }
}
/**
 * 从4个32位的密钥字中获得4X4数组，
 * 用于进行逆列混合
 */
static void getArrayFrom4W(int i, int array[4][4]) 
{
	int index = i * 4;
	int colOne[4], colTwo[4], colThree[4], colFour[4];
	splitIntToArray(w[index], colOne);
	splitIntToArray(w[index + 1], colTwo);
	splitIntToArray(w[index + 2], colThree);
	splitIntToArray(w[index + 3], colFour);
	for(int i = 0; i < 4; i++) 
    {
		array[i][0] = colOne[i];
		array[i][1] = colTwo[i];
		array[i][2] = colThree[i];
		array[i][3] = colFour[i];
	}
}
/**
 * 参数 c: 密文的字符串数组。
 * 参数 clen: 密文的长度。
 * 参数 key: 密钥的字符串数组。
 */
void desm4(char *c, int clen, char *key) 
{
	extendKey(key);//扩展密钥
	int cArray[4][4];
	for(int k = 0; k < clen; k += 16) 
    {
		convertToIntArray(c + k, cArray);
		addRoundKey(cArray, 10);
		int wArray[4][4];
		for(int i = 9; i >= 1; i--) 
        {
			deSubBytes(cArray);
			deShiftRows(cArray);
			deMixColumns(cArray);
			getArrayFrom4W(i, wArray);
			deMixColumns(wArray);
			addRoundTowArray(cArray, wArray);
		}
		deSubBytes(cArray);
		deShiftRows(cArray);
		addRoundKey(cArray, 0);
		convertArrayToStr(cArray, c + k);
	}
}

#define MAXLEN 1024

void printASCII(char *str, int len) {//字符串转16进制
	for(int i = 0; i < len; i++) {
		acipt[i] = (int)*str++;
		acipt[i] = acipt[i] & 0x000000ff;
	}
}

void hex32_str(char *data,char *input)//将16进制串转字符串
{
	int i=0,sum;
	char t;
	for(i=0;i<32;i=i+2)
	{
		sum=0;
		t=data[i];
		if(t<='9')
		{
			sum=((int)t-48)*16;
		}
		else
		{
			switch(t)
			{
			case 'a':sum=10*16;break;
			case 'b':sum=11*16;break;
			case 'c':sum=12*16;break;
			case 'd':sum=13*16;break;
			case 'e':sum=14*16;break;
			case 'f':sum=15*16;break;
			}
		}
		t=data[i+1];
		if(t<='9')
		{
			sum=sum+((int)t-48);
		}
		else
		{
			switch(t)
			{
			case 'a':sum=sum+10;break;
			case 'b':sum=sum+11;break;
			case 'c':sum=sum+12;break;
			case 'd':sum=sum+13;break;
			case 'e':sum=sum+14;break;
			case 'f':sum=sum+15;break;
			}
		}
		input[i/2]=(char)sum;
	}
}

void hex16_str(char *data,char *output,int len)//将16进制转字符串
{
	for(int i = 0; i < len; i++) {
		output[i] = (char)data[i];//data中每个元素为字符对应的十进制数
	}	
}


/**
 * 使用PKCS#7 填充字符串
 p：要填充的明文字符串
 len：明文字符串长度
 */
int PKCS7Padding(char *p, int len)
{
	//ascii码转16进制，temp中每个元素为字符对应的十进制数,方便填充
	for(int i = 0; i < len; i++) {
		temp[i] = (int)*p++;
		temp[i] = temp[i] & 0x000000ff;//temp中为字符转数字，即a=97
	}
	
	int i;
    int block = len/16;//数据分组的组数
    int start = len;//开始补码的地址
    int end=(block+1)*16;//补码后总长度
    int t=16-len%16;//要补的位数,也即要补的字符
    if(t<10)
    {
    	for(i = start; i < end; i++)
        {
            temp[i] = t;
        };
    }
    else if(t<=15)
    {
    	for(i = start; i < end; i++)
        {
            temp[i] = t;
        }
    }
    else if(t==16)//error
    {
    	for(i = start; i < end; i++)
        {
            temp[i] = 16;
        }
    }
    
    hex16_str(temp,uinfo,end);//将temp中的每个元素对应的十进制数转为字符，方便后续对字符串加密
    nnn=end;
    return end;
}

/**
 * 删除PKCS#7 填充字符串
 c：要删除填充的解密后的字符串
 len：解密后字符串长度
 padlen:删除填充后字符串长度
 */
int dePKCS7Padding(char *c, int len)
{
//送进来的为字符串，每个元素为字符，需要先获取最后一个字符，将字符转int，如0a=10，再从len-10开始置0到最后，返回重置后的字符串
    int padlen=(int)c[len-1];
    nnn=len-padlen;
    for(int i=len-padlen;i<len;i++)
    {
    	c[i]='0';
    }
    return len-padlen;
}



void sm4crypt(int len)//sm4加密
{
	int t=strlen((char *)cipt);
    for(int i=0;i<t;i++)
    {
    	key[i]=cipt[i];
    }
    
    len=PKCS7Padding(uinfo,len);//将真实加密支付串值代入，防止二次加密产生错误
	sm4(uinfo,len,key);
	printASCII(uinfo, len);
}


void desm4crypt()
{
	int t=strlen((char *)cipt);
    for(int i=0;i<t;i++)
    {
    	key[i]=cipt[i];
    }
    hex32_str(ucipher,c);
    int clen=strlen(c);
    desm4(c, clen, key);
    nnn=clen;
    int delen=dePKCS7Padding(c, clen);
    printASCII(c, delen);
    
}

int get_int()
{
	return nnn;
}

int get_string(unsigned char *buf)
{
	if(num==0)
	{
    	int t=strlen((char *)cipt);
    	for(int i=0;i<t;i++)
    	{
    		buf[i]=cipt[i];
    	}
    	num++;
    	return 0;
	}
	else
	{
		int tt=strlen((char *)acipt);
    	for(int i=0;i<tt;i++)
    	{
    		buf[i]=acipt[i];
    	}
    	return 0;
	}
}
